A kind of correction type unwinding device with tension force function
The utility model is related to web-handled device field, specifically a kind of correction type with tension force function to unreel
In medical accessory processing industry, numerous raw material are all coiled materials, need to carry out uncoiling in actual production, and set a distance is defeated
Send, seal, the following process such as severing, wherein uncoiling process is that web-like former material is all placed in into one to have on rolling shaft support,
Coiled material is by traction conveyor uncoiling and conveys to the back-end.
In the prior art, traction conveyor is typically provided a pair pairs of rollers, is rotated under the drive of motor, to draw coiled material
Convey backward, wherein traction conveyor is often set to fixed value to the tractive force of coiled material, the transporting velocity for making coiled material is
At the uniform velocity, realize that the unit interval web length of conveying is consistent, to meet the processing request in subsequent handling, for example, severing
Require to carry out set a distance cut-out to coiled material in operation.
However, package raw material manufacturer is during winding, often due to Equipment, pine of the coiled material on parent roll
Tightness is inconsistent, causes during unreeling, and the web length that the draw-gear unit interval transfers out is inconsistent, causes spacing
It is unstable from severing, have a strong impact on the product quality of subsequent handling.
The content of the invention
To solve to unreel technique produced problem in the prior art, the utility model provides one kind and can keep unreeling speed
At the uniform velocity and the unwinding device with automatic deviation rectifying function.
Concrete scheme of the present utility model is：A kind of correction type unwinding device with tension force function, with support,
The two ends of support are symmetrically equipped with two supporting plates, and the position that the support two ends are located above supporting plate is equipped with two sliding axles
Hold, gas expansion shaft is housed between two sliding bearings, strain braking device is housed in the supporting plate of described support one end, the other end
Tension force aggressive device is housed in supporting plate, automatic deviation rectifying device is also equipped with the supporting plate of one end wherein；
The output end that the strain braking device has magnetic powder brake, magnetic powder brake is risen by oldham coupling with gas
Axle is connected, and arrangement of clutch is also equipped between magnetic powder brake and gas expansion shaft；
The output end that the tension force aggressive device has motor, motor is connected by oldham coupling with gas expansion shaft
Connect, arrangement of clutch is also equipped between motor and gas expansion shaft；
The output end that the automatic deviation rectifying device has servomotor, servomotor is connected with screw mandrel, and screw mandrel is by some
Individual bearing block is fixed on the supporting plate, and being equipped with the screw mandrel can order about the deviation correction mechanism that air-expanding shaft makees axial displacement.
Arrangement of clutch described in the utility model is electromagnetic clutch.
Deviation correction mechanism described in the utility model has motion block of the thread set on screw mandrel, and motion block is along the two of screw mandrel axial direction
Side is welded with block, and the air-expanding shaft is provided with baffle ring positioned at deviation correction mechanism one end near the position of end, and the baffle ring is fastened on
Between two pieces of blocks of motion block both sides, guide post is also slidably fitted with the motion block, the one or both ends of guide post are fixed on
On the bearing block of screw mandrel.
Compared to existing technology, the advantage that the utility model possesses is：
1st, tenslator is equipped with, can will be unreeled length speed automatically and remain definite value according to the change for unreeling speed,
Ensure the smooth implementation of subsequent handling；
2nd, automatic deviation rectifying device, shift state of the automatic detection coiled material during unreeling vertically are equipped with, and are subject to
Correct, it is ensured that the quality of finished product.
Brief description of the drawings
Fig. 1 is the utility model front view；
Fig. 2 is strain braking device and automatic deviation rectifying device schematic diagram in the utility model；
Fig. 3 is utility model works schematic diagram.
In figure：1- supports, 2- supporting plates, 3- sliding bearings, 4- gas expansion shafts, 5- coiled materials, 6- strain braking devices, 7- magnetics
Brake, 8- oldham couplings, 9- electromagnetic clutch, 10- tension force aggressive devices, 11- motors, 12- automatic deviation rectifying devices,
13- servomotors, 14- screw mandrels, 15- deviation correction mechanisms, 16- bearing blocks, 17- motion blocks, 18- blocks, 19- baffle rings, 20- guide posts,
21- draw-gears, 22- is to roller, 23- tension force detection sensors, 24- photoelectric sensors.
In the present embodiment, a kind of correction type unwinding device with tension force function, with support 1, the two ends of support 1
Two supporting plates 2 are symmetrically housed, each top of supporting plate 2 is respectively arranged with sliding bearing 3, and gas expansion shaft 4 is housed between sliding bearing 3,
Coiled material 5 is arranged on gas expansion shaft 4.
Strain braking device 6 is housed in the one of supporting plate 2 of support 1, the strain braking device 6 includes magnetic powders brake
Device 7, oldham coupling 8 and electromagnetic clutch 9, its function are mainly suppression and unreel excessive velocities, and its structure is：Magnetic powder brake
7 output end is connected by oldham coupling 8 with electromagnetic clutch 9, and the one end of electromagnetic clutch 9 again with gas expansion shaft 4 is connected；
Tension force aggressive device 10 is housed, the tension force aggressive device 10 includes motor 11, sliding block in another supporting plate 2 of support 1
Shaft coupling 8 and electromagnetic clutch 9, its function are mainly raising and unreel speed, and its structure is：The output end of motor 11 passes through
Oldham coupling 8 is connected with electromagnetic clutch 9, and the other end of the electromagnetic clutch 9 again with gas expansion shaft 4 is connected.
Automatic deviation rectifying device 12, automatic deviation rectifying device 12 are also equipped with the supporting plate 2 of the side of installation tension brake apparatus 6
Including servomotor 13, screw mandrel 14 and deviation correction mechanism 15, its function is mainly during correction is unreeled coiled material 5 in the axle of gas expansion shaft 4
Upward skew, its structure is：Two bearing blocks 16, screw mandrel 14 are one in front and one in back axially installed along gas expansion shaft 4 in supporting plate 2
It is arranged in parallel in supporting plate 2 by bearing block 16 and gas expansion shaft 4, servomotor 13 couples with one end of screw mandrel 14, rectification machine
Structure 15 includes the motion block 17 at thread set position between screw mandrel is located at two bearing blocks 16, and the first from left backhand welding of 17 both sides of motion block one connects
There are two pieces of blocks 18, gas expansion shaft 4 is provided with baffle ring 19 positioned at the one end of deviation correction mechanism 12 near the position of end, and the baffle ring 19 can engage
Between two pieces of blocks 18 of the both sides of motion block 17, additionally, guide post 20 is also slidably fitted with motion block 17, the two of guide post 20
End is fixed on the bearing block 16 of screw mandrel 14, in case scotch 17 is rotated together with screw mandrel 14, while can also direct motion block 17
Slid axially along screw mandrel 14.
In the present embodiment, during unreeling, draw-gear 21 is installed in front of unwinding device, draw-gear 21 passes through one
Rotation to driving coiled material 5 in unwinding device to roller 22 is unreeled, and tension force detection sensor 23 is housed on draw-gear 21, is passed through
The detectable tension variation situation for unreeling period material of tension force detection sensor 23；
When material overtension is unreeled, the parent roll tension of coiled material 5 is illustrated, unreel speed reduction, detection signal is by control
Device is analyzed, and signal is fed back into tension force aggressive device 10, and tension force aggressive device 10 improves the rotating speed of motor 11, and raising unreels speed
Degree, reduces material tension force, it is ensured that it is consistent that what the unit interval of draw-gear 21 was sent out unreels material length；
When unreeling material tension force and being too small, illustrate that the parent roll of coiled material 5 relaxes, unreel speed increase, detection signal is by control
Device is analyzed, and signal is fed back into strain braking device 6, controls the operating current of magnetic powder brake 7, is applied to magnetic powder brake 7
The axial moment of torsion of parent roll, reduction unreels speed, increases material tension force, it is ensured that what the unit interval of draw-gear 21 was sent out unreels material
Length is consistent.
Additionally, on draw-gear 21 on the basis of one side of coiled material 5, being configured with two groups of photoelectric sensors 24, detection volume
The drift condition of the true edge of material 5, if the left and right skew of true edge exceedes this group of detection range of photoelectric sensor 24, controller
By Boolean calculation, control automatic deviation rectifying device work, servomotor 13 is rotated, and drives gas expansion shaft 4 and the parent roll of coiled material 5 along axle
To skew（Will not be relatively moved between parent roll and axle）, so as to keep the position of the true edge of draw-gear 21.